Clean-tech investing decreases faster than the Dow

According to an Economist article, investments in clean-technology has dropped off faster than the decline in oil prices. This correlates well with my personal experience in working to raise funds for a clean-technology accelerator (NXergy). Looks like everything's going to be pushed out a year or two... depending on when oil prices creep back up around $4 to $5 (or more) a gallon.